Where can one find reliable documentation on handling timestamps in PHP?

When working with timestamps in PHP, it is important to ensure that the time zone is set correctly to avoid discrepancies in date and time calculations. One reliable source of documentation for handling timestamps in PHP is the official PHP manual, which provides comprehensive information on date and time functions and how to work with timestamps effectively. 

// Set the default time zone to avoid discrepancies
date_default_timezone_set('UTC');

// Get the current timestamp
$timestamp = time();

// Convert timestamp to a human-readable date format
$date = date('Y-m-d H:i:s', $timestamp);

echo $date;

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PHP timestamps documentation handling reliable

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